president obama and the first lady will head to south africa next week to honor the south african leader thafl be traveling with former president bush and laura bush. wolf blitzer talked with clinton about the advice for mandela that guided him through some very difficult times. >> he was saying, if you're in public life and you have public responsibilities, you cannot be free and effective unless you have no personal feelings of anger. i remember one day, about a month after that whole impeachment business was over, henry hyde who had run the whole show, unbelievably enough, maybe it was a few months after, with you it was shortly after. asked for a meeting at the white house. for something that he was really interested in, he brought a delegation and my staff said i can't believe you're going to do. this i said it is my job to do it. he is a member of congress and a senior member. and they came and left. and as far as they knew, i did not even remember what had happened. i was able to do that because of what nelson mandela did for me. the way he help me. >> joining us now, cornell west